Marathon swimming is a long-distance swimming event that typically covers a distance of 10 kilometers (6.2 miles) or more. It can take place in open water, such as oceans, lakes, or rivers, and is often part of competitive swimming events. Swimmers must navigate various conditions, including currents, waves, and temperature changes, making endurance and technique essential. This sport is governed by organizations like FINA (Fédération Internationale de Natation), which sets the rules and standards for competitions. Marathon swimming events can be individual or relay races, and they often attract athletes from around the world, showcasing their skills and stamina in challenging environments.